Metabolic and locomotor responses of juvenile paddlefish Polyodon spathula to hypoxia and temperature

Aboagye, Daniel L.; Allen, Peter J.

doi:10.1016/j.cbpa.2013.12.016

Cited by 19 publications

(20 citation statements)

References 78 publications

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“…In addition, fish in the closed respirometry method exhibited increased incidence of LOE, which is known to be exacerbated by elevated levels of stress (Magaud et al , ; Aboagye & Allen, ). Previous work suggests that there is a correlation between oxygen saturation at LOE and O 2crit (Mandic et al , ), a finding supported by the closed respirometry results of this study.…”

Section: Discussionmentioning

confidence: 99%

“…e . the time period over which the fish is left in the chamber to calm to SMR) ranges from 1 to 48 h in duration (Steffensen et al , ; Nilsson & Ostlund‐Nilsson, ; Nilsson et al , ; Killen et al , ; Aboagye & Allen, ; Eliason & Farrell, ). The resting period must (1) provide enough time for the fish to adjust to the respirometer and repay any oxygen debt resulting from the stress of the handling and transfer and (2) take into account any circadian cycle in the fish's metabolism (Chabot et al , ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of closed v. intermittent‐flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata

Snyder

Nadler

Bayley

et al. 2016

Journal of Fish Biology

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This study compares the critical oxygen saturation (O 2crit ) levels of the shiner perch Cymatogaster aggregata obtained using two different methods wherein hypoxia is induced either by the fish's respiration (closed respirometry) or by degassing oxygen with nitrogen (intermittent-flow respirometry). Fish exhibited loss of equilibrium at a higher O 2 saturation in the closed respirometry method when compared with the intermittent-flow method. Utilization of closed respirometry yielded O 2crit measurements that were almost twice as high as those obtained with intermittent-flow respirometry. The lower hypoxia tolerance in closed respirometry is consistent with additional stress, caused by a build-up of ammonia and carbon dioxide and a faster rate in dissolved oxygen decline. The results indicate that these two methods of determining hypoxia tolerance in aquatic organisms are not comparable, and that much care should be given to method choice.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of closed v. intermittent‐flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata

Snyder

Nadler

Bayley

et al. 2016

Journal of Fish Biology

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“…In other species, both an effect and no effect of acclimation to one stressor on the tolerance of the other stressor have been described. For example, the hypoxia tolerance of paddlefish (Polyodon spathula) decreased when the acclimation temperature was increased from 18 to 26°C (Aboagye and Allen, 2014). In contrast, both warm and hypoxia acclimation increased hypoxia tolerance of Southern flounder (Paralichthys lethostigma) (Del Toro-Silva et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Warm acclimation and oxygen depletion induce species-specific responses in salmonids

Anttila

Lewis

Prokkola

et al. 2015

Journal of Experimental Biology

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Anthropogenic activities are greatly altering the habitats of animals, whereby fish are already encountering several stressors simultaneously. The purpose of the current study was to investigate the capacity of fish to respond to two different environmental stressors (high temperature and overnight hypoxia) separately and together. We found that acclimation to increased temperature (from 7.7±0.02°C to 14.9±0.05°C) and overnight hypoxia (daily changes from normoxia to 63-67% oxygen saturation), simulating climate change and eutrophication, had both antagonistic and synergistic effects on the capacity of fish to tolerate these stressors. The thermal tolerance of Arctic char (Salvelinus alpinus) and landlocked salmon (Salmo salar m. sebago) increased with warm acclimation by 1.3 and 2.2°C, respectively, but decreased when warm temperature was combined with overnight hypoxia (by 0.2 and 0.4°C, respectively). In contrast, the combination of the stressors more than doubled hypoxia tolerance in salmon and also increased hypoxia tolerance in char by 22%. Salmon had 1.2°C higher thermal tolerance than char, but char tolerated much lower oxygen levels than salmon at a given temperature. The changes in hypoxia tolerance were connected to the responses of the oxygen supply and delivery system. The relative ventricle mass was higher in cold-than in warm-acclimated salmon but the thickness of the compact layer of the ventricle increased with the combination of warm and hypoxia acclimation in both species. Char had also significantly larger hearts and thicker compact layers than salmon. The results illustrate that while fish can have protective responses when encountering a single environmental stressor, the combination of stressors can have unexpected species-specific effects that will influence their survival capacity.

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“…Since the 1950s, this phenomenon has been well known to occur in a wide range of small mammals (Hill, 1959) and in newborn larger mammals, including humans (Cross et al, 1958). Hypoxia-induced reduction in body temperature and resulting metabolic inhibition plays an important protective role by decreasing oxygen demand, removing energy-expensive thermogenesis, improving oxygen affinity, and decreasing the cost of ventilation (Gautier et al, 1987, 1993; Wood and Malvin, 1991; Aboagye and Allen, 2014). Many studies support hypoxia reducing the hypothalamic thermoregulatory set-point (Mortolaet al, 1989; Clark and Fewell, 1996) and suggest that this must be a regulated process.…”

Section: From Hypoxia To Ischemia: Mechanism Of Neuroprotectionmentioning

confidence: 99%

Preconditioning in neuroprotection: From hypoxia to ischemia

Hafeez

Noorulla

et al. 2017

Progress in Neurobiology

174

114

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Sublethal hypoxic or ischemic events can improve the tolerance of tissues, organs, and even organisms from subsequent lethal injury caused by hypoxia or ischemia. This phenomenon has been termed hypoxic or ischemic preconditioning (HPC or IPC) and is well established in the heart and the brain. This review aims to discuss HPC and IPC with respect to their historical development and advancements in our understanding of the neurochemical basis for their neuroprotective role. Through decades of collaborative research and studies of HPC and IPC in other organ systems, our understanding of HPC and IPC-induced neuroprotection has expanded to include: early- (phosphorylation targets, transporter regulation, interfering RNA) and late- (regulation of genes like EPO, VEGF, and iNOS) phase changes, regulators of programmed cell death, members of metabolic pathways, receptor modulators, and many other novel targets. The rapid acceleration in our understanding of HPC and IPC will help facilitate transition into the clinical setting.

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Metabolic and locomotor responses of juvenile paddlefish Polyodon spathula to hypoxia and temperature

Cited by 19 publications

References 78 publications

Effect of closed v. intermittent‐flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata

Effect of closed v. intermittent‐flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata

Warm acclimation and oxygen depletion induce species-specific responses in salmonids

Preconditioning in neuroprotection: From hypoxia to ischemia

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